Correspondence: Hideo Hasegawa, h1949105@med.u-ryukyu.ac.jp
Hideo HASEGAWA
Department of Parasitology and Research Center of Comprehensive Medicine, Uniiversity of the Ryukyu, Nishihara, Uehara 207, Japan.
Masataka KORENAGA
Hideo KUMAZAWA
Kyoko IMAMURA
Departement of Parasitology, Kochi Medical School, Nankoku, Kochi 783, Japan